I suspect that you have different settings on the Windows machine than on the 740 such that some of the targets are filtered out. None of the targets your arrows point at are very close to you.
Look at both devices under Map Mode > Traffic (gear icon) > Distance Visibility (and Vertical Clearance Visibilty)
I bet both of those settings are "Unlimited" for your 740, but something more constrained for the Windows device.
BTW, that's my backyard! Just fueled up in Liberty last weekend. Some of the best prices around...